Tiltable bottom cable operated



' Aug. 26, 1941.

H. C. FRENCH TILTABLE BOTTOM CABLE OPERATED SCRAPER Original Filed Oct. 19, 1939 5 Sheets-Sheet l Aug. 1941- H. c. FRENCH TILTABLE BOTTOM CABLE OPERATED SCRAPE'R Original Filed 001;. 19, was Shets-Sheet 2 ATTORN EY Aug. 26, 1941. H. c. FRENCH TILTABLE BOTTOM CABLE OPERATED SCRAPER 3 Sheets-Sheet 5 Original Filed Oct. 19, 1939 INVENTOR C6 BY I an/FM I ATTORN EY.

, Reissuecl Aug, 1941 I UNITED, STATES PATENT-OFFICE Henry 0. French, Elm Grove, Wia, assignorto The Hell 00.; Milwaukee, Win, a corporation or Wisconsin Original No. 2,229,24Ldated January 21, 1941,

Serial No. 300,181, October 19, 1939. Application for reissue July 'i, 1941, Serial No. 401,340

g as Claims. (Cl. 31-426) My present invention relates generally to imthe load resting thereon over the blade, both the provements i'n the art of moving dirt andrelates front apron and the unitary bottom andrear more specifically to various improvements in the wall being operable by means of a single construction and operation of scrapers i'or digcable. While this type of 'prior assemblage ging, hauling and spreading earth such as sand, has advantages over the movable rear endgravel, ground or the like. gate type, in that the tilting of the load sup- Generally defined, an object or my present inporting bottom permits more eifective discharge vention is'to provide an improved scraper which of the loads under all conditions, the simultaneis simple in construction I and efilcient in use ous tilting of the rear-wall which is formed inwhen operating on various kinds of soil, 1 tegral with the tiltable bottom is still objection- Numerous difierenttypes of so-called dig and able because it produces a corner at the junction carry scrapers have heretofore been proposed and or these elements in which packed dirt can acused commercially with more or less success, but cumulate, land it also requires additional power all of these prior scraper assemblages have ento tilt the rear wall with the bottom. countered difliculty in loading certain material In my prior application Serial No. 294,047, filed such as gravel, since the smooth and round September 9 1939, I have shown and described a' stones constituting such material tend to predig and carry scraper or the type having a hunt ventitight closing of the confining space and roll apron and a tiltable bottom with inte a real out of the load confining chamber or bowls with WalL' DB -DIB by means of a single cable which great rapidity. This difficulty is primarily due coacts with the tiltin bottom and ,rear' wall to the fact that in the previous assemblagea'the through a ink uspended from a travelling sheave front load confining bowl or apron which coopmovablerfllons an up y a forwardly crates t t cutting blade t confine and build. clined guide rail disposed centrally above the load up the load. coacts with this blade above its cutconfining sp Thi imp ov d operating mechting edge, and therefore permits an intervening 2o sm h n v n highly at sfa t ry nd advanlayer of stones to lodgebetween these elements tageous in t s the lo confining. pp g and thus prevents tight closing or the gap, and discharging elements with minimum power It is therefore one of the more specific objects 7 but the u a r w l ,f r d in e ral witli or my present i v ntion t provide improved the bottom is still objectionable in this prior a'sstrumentalities for obviating the-above mentioned semblafle for the QQ Q h n above i d cated. difliculty, and for permitting effective loading o: It is thfi e oreafiother specific object or the a carrier scraper with gravel or other material. Present invention an p o d dis having similar characteristics. and carry Scraper having afront load confinin Am'ong' the prior dig and carry scrapers, "we apron which 109415 y b mo also findwarious modes of dischargin th loads effectively discharged with minimum eflort by either with the aid of hydraulic jacks or with camerely 8 the load supporting bottom. bles coacting with sheaves and a winch. In one, further sPeci-flcl object 01 y P t nv n- 1; t prior ,scr gper; having a load c fini tion is to provide a scraper in which the load bowl. provided with a cuttingblade and a front cpnflmng Space is bounded by Opposite sides apron cooperable t the blade, f rwardly 40 and a rear end wall fixedly associated with a movable endgate is provided within the bowl, t nsportable frame, and wherein the bottom of d t t 1 m; p g t rear endure the space above is readily tiltable to'more eiare operable)! means single 1 iectively deliver loads of various materials fobcause of the fact that the upright rear endgate W y over a scraper blade. of this prior assemblage must be moved approx- A itional spe biect of the invention is imatelyhorizontally over a horizontally disposed to Provide a w d u d e an a ry scrap fixed bowl bottom, it is dlificuit to discharge the wherein ptransroriablescraper blade '8 5- 4 load when theimaterial ispacked, without uti arable with nt a d liar tiltabie load confin lizing'great force and necessarily unduly stress-- n! m mbers which are devoid of bi m l ing the various parts.- It has also been hereto-- t retaining fia e o t cti y fore proposed to provide a scraper assemblage of d a p r t vmf t e ads, While thetype havinga front load confining aprorr being returnable to normal position by gravity. .cooperable with a scraper blade, wherein the in- 1 Another specific object of the present inventegral bottom and a rear-wall constituting load tion is to provide various improvements in the supporting parts, are tiltable as a unit to deliver construction and operation 01 scrapers or the 2 I type forming the subject of my prior application Serial N0. 294,047, filed September 9, 1939, and

and carry scrapers shown, but not specifically claimed in the present-application, form the subject of my said prior application.

The above and other specific object and advantages obtainable with my present invention, will be apparent from the following detailed description.

A clear conception of the several features constituting my present invention, and of the mode of constructing andof utilizing a dig and carry scraper built in accordance with the improvement, may be had by,- referring to the drawings accompanying and forming a. part of this specisome of the novel features of cable operated dig fication wherein like reference characters desig- I hate the same or similar parts in the various I views.

Fig. 5 is a similar'fragment showing a similar I ilap spring pressed against the rear load confining wall. I I While the improvements have been shown and escribed herein as being embodied in a. cable operated scraper of the dig and carry type having a front apron for confining the loads, it is not intended to thereby unnecessarily restrict the scope or utility of the invention.

Refen'ing' to Figs. 1 to 3 inclusive of the drawings, the improved dig and carry scraper shown therein by way of illustration, comprises in genera] a sturdy front frame Btransportable by and swingably supported upon a front wheel supported carriage 9, and having laterally separated rearwardly and downwardly extending integral side arms III; a sturdy rear frame 'l| transportable by and swingably mounted upon a rear wheel supported carriage i2, and having laterally separated forwardly extending integral opposite side walls I3 disposed betweenthe rear ends of the front frame arms Ill and rigidly interconnected by means of a curved 'rear wall l4. having pper-and lower. cross-beams IS, IS respectively associated therewith, and by front cross-beams l1, l8 located forwardly of the wall ll to provide an open bottom: alined pivot pins ll articulably interconnecting the rear ends'of the front frame arms III with the medial outer portions of the rear frame side walls i3; a flat load suppor ing bottom plate pivotally suspended at its front from the front lower crossbeam "in close proximity to the transverse scraper or cutting blade 2| carried by this beam. by means of a pivot shaft 22,-the plate 20 having its rear end 'engageable with lugs 23 secured to thelower rear beam I0 and swingable upwardly alongthe curved rear wall I4, and also having.

' a bracket :4 rigidly attached to its medial rear pins 21, and having its lower cut-offedge 2t cooperable with and swingable beneath the cutting edge of the blade 2| to confine material 29 within the space bounded by the walls l3, I4 above the bottom plate 2|]; a frame section articulating lever 3|! swingably suspended from the front frame 8 by means of a pivot shaft 3|, and having its rear end connected to the medial portion of the upper front cross-beam It by a set of links 32 and pivot pins; mechanism for effecting articulation of the frames 8, II to raise and lower the cutting blade 2| and the load confining elements; and other mechanism for raising and lowering the apron and bottom plate 20 independently of the elevation of the blade.

The front and rear frames 8, i, the bottom plate 20, and the apron 25 should be formed of durable sheet metal welded or otherwise firmly united to produce rigid structures, and the front carriage 9 is transportable on wheels 33 while the rear carriage I2 is transportable upon similar wheels 34. The front carriage 9 may be provided with the usuaF draw bar adapted for convenient attachment to a. tractor, and the front frame 8 is of rigid box-beam construction and of sufficient height to permit the wheels 33: to clear 'when making sharp turns. The rear frame II is swingable in avertical plane about the axle of the rear carriage 9, and the side and end walls |3, |4 should be abundantly reenforced by ribs and braces ir order to prevent distortion or defiection thereof. The rear end wall I4 is rigidly united with the opposite side, walls i 3, and the latter are additionally firmly united by the crossbeams l5, l8, l1, l8, so that's. sturdy load confining chamber is produced in spite of the fact that the bottomof the rear frame II is open except for the closure tom plate 20. I

The load supporting bottom plate 20 should be of durable construction, and should have a fiat top surface devoid of dirt catching corners, so

that .when the plate 2|) is tilted upwardly, the swinging end thereof will scrape dirt deposits from the curved surface of the fixed rear wall l4, and as this plate reaches its maximum tiltedposition the load will be effectively discharged by gravity. In order to enhance the discharge ,of sticky material from the plate 20, the rear ends of apron carrier arms 28 may be provided with bumper blocks 35 which mayalso form stops for the upward swinging movement of the plate, j and against which the bottom plate may be caused to impinge. The upwardly swinging bottom plate '20 will also scrape dirt deposits from the side wallsl3, andany particles which fall through the slight gaps between the bottom plate and the walls l3, H or over the swinging end of the plate 20, will fall to the groundthrough the open bottombf the rear frame II, The top of the fixed rear wall H is preferably directed forwardly and is of sufllcient height to prevent material from passing thereover until after the load confining space has been filled to capacity. The lower front cross-beam l1 from which the bottom plate 20 and blad 2| are suspended, must be ofvery sturdy constr ction, and the blade 2| maybe made reversible.

portion: a front load confining apron'zii having,

integral opposite side arms 28 disposed between and swingably suspended from the side walls it The front apron 25 is of improved construction 'in that the cut-off blade or edge 28 thereof is adapted to pass beneath the cutting edge of the blade 2| as shown in Fig. 2 of the drawings, in

order to prevent escape of material from the load confining zone. This feature is especially useful in loading gravel, since it prevents stones from produced by the tiltable botlodging between the apron edge-2e and blade, 2|

whereby closing of the gap between these elements might be prevented. The front of the apron 25 is provided with rigid ears 35, and the side arms 25 are preferably curved abruptly as shown, in order to avoid obstruction by the load to closing of theapron. h 1

The mechanism for effecting swinging of the front apron 25 and of the bottom plate 20, is similar to that shown and described in my prior copending application Serial No. 294.047, and

comprises a single cable 31 which first raises the apron 25 and subsequently tilts the plate 20 to discharge the load. The rear frame II is provided with a set of upwardly and forwardly inclined guideways or tracks 38 the lower rear ends of which are rigidly attached to-the medial portion of the fixed rear wall l4, and the front upper ends of which, are firmly supported from the upper front cross-beam It by means of outwardly inclined struts 39. A pair of cable sheaves 40 are carried by a shaft 4! supported on rollers 42 which are adapted to roll or travel along the tracks 38, and the travelling shaft 4| is connected to the bracket 24 at the rear of the bot- -torn plate 2|) by means of links 43 and a pivot pin 44. The sheaves 4|) are obviously simultaneously movable along the tracks 35, and when these sheaves are moved upwardly and forwardly they will tiltthe bottom plate 20, as clearly shown in Fig. 3. The front apron 2! has a single cable sheave journalled between the integral ears 36 thereof by means of a shaft 45', and is adapted to be swung about its pivot pins 21 from closed or lowered position as shown in Fig. 2, to raised or fully elevated position as shown in Fig. 3 wherein it may be caused to engagestop lugs 41 on the side walls l3. The upper front ends of the rails or tracks .38 may be secured to the struts 25 by a rigid bracket 45 in which a. shaft 49 is mounted, and a set of four alined sheaves 50 is rotatably mounted upon the shaft 49. Another sheave 5! may be mounted upon the frame elevating and lowering lever 30 by means of a journal shaft .52, and the single cable 31 coacts successively with the sheave 51, one sheave 50,

the sheave 45, another sheave 55, one sheave 4!], still another sheave 50, with the other sheave 40, and finally with the fourth sheave 55, and has its rear end secured to the rear frame H by a cable connector 53; so that a pull on the cable '31 will first elevate the apron 25 and will thereafter swing the plate 25 upwardly, while release of the pull will cause gravity to first lower theplate 20 and thereafter lower the apron 25.,

Mounted upon the forward swinging end of the lever 30 is another set of alined sheaves 54 which are journalled on the shaft 55, and the single cable 31 after passing forwardly in contact with the sheave 51 may be caused to' coact with one of these sheaves 54. A shaft which is carried by the forward upper portion of the front frame 8 provides a journal support for still another set of sheaves 51; and the actuating cable 31 for the apron 25 and bottom plate 20, after passing over the floating sheave 5|, coacts with one of the sheaves 51 and extends forwardly between guide The mechanism for relatively swinging the front and rear frames], I I about the pivot shafts ll, comprises a second cable. Ol which eirtends or lever 50. This assemblage is such, that when a pull is exerted on the cable 55, the lever 25 will be swung about its pivot shaft 2| from the position shown in Fig. 1 or Fig 3, to that shown in Fig. 2, thereby swinging the frames 8, ilrelatively to each other about the pivot shafts Iii and elevating the cutting blade 2|; and when the pull on the cable 50 is released, gravity acting upon the rear frame I I and associated parts and material 29, will cause the scraper blade 2| to lower more or less toward the ground, and will also swing the front end of the lever 30 upwardly.

By virtue of the fact that the cable 51 which actuates the front apron 25, coacts with the sheaves BI, 54 carried by the swinging lever 30,

the apron 25' willalso be affected by raising and lowering of the cutting blade 2|, independently of its operation by the cable 51. This secondary movement of the apron 25-is such that the material 25 will be most effectively retained within the load confining zone as the blade 2| is raised and lowered.

While the load supporting bottom plate 2|! of Figs. 1. to 3 inclusive has its rear end directly cooperable with the curved and fixed rear wall l4, without the provision of any sealing means, it may in some cases be desirable to provide means for sealing the gap between the bottom plate 20 and the wall M. In Fig. 4, I have shown the rear swinging end of the plate 20, provided with a flap 52 swingably suspended from the plate 20 by meansofa pivot pin 53 and having its upper edge formed for scraping engagement with the rear wall i4; -While the scraper flap 62 may be held in proper engagement with the wall l4 by the material 29, I may also provide one'or more leaf springs 54 secured to the bottom plate 20 and coacting with the flap 52 in order to resiliently retain this flap in scraping engagement with the wall II, as shown in Fig. 5.'

During normal operation of the improved scraper, the front and rear frames 5, ll may be relatively adjusted so as to either lower the cutting blade 2| into the ground as shown in Fig. l for loading purposes; or this blade may be elevated to the position shown in Fig. 2 forv load carrying purposes; or the frames may be positioned as shown in Fig. 3 for the purpose of permitting discharge and spreading of the material 25. When the assemblage is in the position illustrated in Fig. l and'the scraper is being advanced along the ground,.the material 25 will enter the load confining space and will pile up upon the bottom plate 20 and against the side walls 13 and the fixed rear end wall i4.

, If the material 28 should reach a height above rollers 58, 59 to the hoisting winch located on" the propelling tractor near the drivefs seat.

With this arrangement of sheaves and cable, the single cable 31 may not only be utilized to suecessively fully elevate or tilt the apron 25 and bottom plate 20, but it may also be used to swing these elementsv to any desiredintermediate position. v

the upper extremity of the rear wall I4 the inclination of this wall will cause the dirt to travel forwardly toward the front apron 25, and will thus prevent spilling of dirt over the rear wall i4. Any slight quantities of material which may escape at the edges and rear of the bottom plate 20, will obviously fall to the ground since the space beneath this plate is open. During the scraping operation, the front apron 25 should be elevated more or less. so as to confine the accumulated material 29 within the load confinspread the same.

ing zone, and the front apron should preferably.

be gradually lowered as the load accumulates so as to insure most effective-confinement,

When the load confining zone has been properly filled with material 29, the front'apron 25 may be completely lowered to the position shown in Fig. 2 wherein the lower edge 28 of the apron 25 is disposed beneath and closely adjacent to the cutting blade 2|. In order to thus lower the apron 25, it is only necessary to release the pull on the cable 31, whereupon the apron will drop When the blade 2| has been'properly positioned,

the cable 50 may be held in fixed position, and

' the cable 31 may then be actuated to subsequently elevate the front apron 25 to its extreme uppermost position with the arms 26 thereof against the stops l1. Subsequent pull on the cable 31 will cause the plate,2|l.to swing upwardly and forwardly about its pivot shaft 22, thereby delivering the material 29 over the scraper blade 2| and onto the ground. During this tilting of the plate 20, the rollers 42 will ride upwardly along the rails 38 and will cause the links 43 to positively tiltthe plate 20. As this plate reaches its uppermost position of tilting, it may be caused to impinge against the bumper blocks 35 so as to remove adhering dirt from the upper surfaces of the plate, and when plate 20 moves upwardlyalong the wall it, it will obviously remove adhering material from this fixed wall. As the material 29 is delivered onto the ground, the advancement of the scraper will cause the blade 2| to effectively spread the material evenly over the ground.

When the load has been fully discharged from the confining zone, the pull on the cable 31 may be released, whereupon the plate 20 will first be restored to lowered or approximately horizontal position, after which the front apron 25 will likewise be lowered due to the action of gravity. Because of the fact'that the plate 20 cannot be swung any farther than is permitted minimum eiiort. The important features of the present invention as distinguished'from my prior application hereinabove referred to, are the formaticn of the apron 25 so that it will close beneath the cutting edge of the blade, and the discharge of the material by tilting the bottom plate 20 alone. The travelling sheave and rail 'mechanism for effecting tilting of the bottom plate 20 has been found most advantageous because it permits tilting of the platewith very little effort. The provision of a fixed rear wall 4 also materially enhances the strength of the rear frame II, and while the flaps 82 for removing material from this rear wall are not absolutely necessary, they may in some cases be desirable. The improved machine can obviously be readily manipulated from a'propeliing tractor and. besides being very durable in construction,

I is also simple in construction and highly efilcient in use. By virtu of the fact that the load supporting bottom plate is fiat and cooperates. with a rearwardly and downwardly inclined fixed end wail, this scraper has considerably greater load carryingcapacity than prior scrapers wherein the rear wall is formed integral with the bottom, and the movement of the plate 20 along the fixed rear end gate or wall prevents accumulation of material on this wall.

It should be understood that it is not desired to limit this invention to the exact cletails of construction or to the precise mode of use, herein by thebumper blocks 55, and also because of the inclination of the rails 33, the plate 20 will quickly drop to its lowered position in engagement r 'with lugs 23.when the pull on the cable is released. The fact that the front apron 25 is suspended from the pivot pins 21 by means, of

long arms' 26; will also cause the apron 25 to drop rapidly when the cable pull is released, and

by causing the lower edge of the apron 25 to pass beneath the cutting edge. of the blade 2|,

material is prevented from lodging between the V apron and blade so that the load will be most effectively confined. Q a

From the foregoing detailed description it will be apparent that the improved scraper may be most effectively utilized to load and confine the material 29 and ,to thereafter discharge and machine" may be quickly and effectively accomplished with the aid of only two cables, and by All of the operations of the shown and described, for various modifications within the scope of the claims may be apparent to persons skilled in the art. p

I claim:

1. A scraper comprising, a frame transportable along the ground and having a transverse cutting blade and opposite side walls forming a load confining zone in proximity to said blade,

and an apron swingably suspended from said walls and being movable between said side walls toward said blade to confinethe load within said zone, said apron having its loweredge disposable beneath the cutting edge of said blade and cooperating with said walls to effect load confinement. 2.- A scraper comprising, a frame transportable along the ground and having a transverse cutting blade and opposite side walls rigidly at-' tached to said blade and forming a load confining -zone, and a front apron swingably suspended from said walls and being movable downwardly and rearwardiy between said side walls toward said blade to confine the load within said zone,

said apron having its lower transverse edge swingable beneath and closely-adjacent to the cutting edge of said blade and constantly cooperating with said walls to effect load confinev ment.

3. A scraper comprising-a transportable framehaving opposite side portions rigidly connected by a fixed upwardly and forwardly curved rear wall, a scraper blade interposed between said side portions forwardly of said wall, and a relatively 'flat bottom plate hingedly supported "near said blade and having its rear end swingable along and in close proximity to said wall.

4. A scraper comprising a transportable frame having oppositesideportions rigidly connected by a' fixed upwardly .and forwardly curved rear wall, a scraper blade interposed between said side portions forwardly of said wall, a relatively fiat bottom plate hingedly supported near said blade and having its rear end swlngable-along and in close proximity to said wall, and'means having a transverse scraper operable from the front of said frame for swinging said bottom plate to dump material over said blade.

5. A scraper comprising, 3 transportable frame having opposite side walls rigidly connected by a fixed upwardly extending curved rear wall, a scraper blade rigidly connecting said side walls forwardly of said rear wall, and a relatively flat .bottom plate hingedly suspended from said frame near said blade and having its rear end swingable along and in close-proximity to said curved wall between said side walls.

6.'A scraper comprising, a transportable frame having opposite side walls rigidly connected by a fixed upwardly extending curved rear wall, a

scraper blade rigidly connecting. said side walls forwardly of said rear wall, a relatively fiat bottom plate hingedly suspended from said frame near saidlblade and having its rear end swingable along and in close proximity to said curved wall between said side walls, and operating means manipulable from the front of said frame for tilting. said bottom plate to deliver material over said blade.

7. A scraper comprising, a transportable frame having opposite side portions connected by a rigid rear" wall provided with a curved surface, a scraper blade mounted on said frame forwardly near said -movable along and in close proximity to said 5 a relatively fiat bottom plate hingedly suspended blade and having its swinging end wall, a track carried by said frame centrally above said plate, a. sheave movable along said track and being connected to the swinging end of said plate, and means for advancing said sheave along said track.

13. A scraper comprising, a transportable frame having a transverse scraper blade and a fixed load confining wall disposed parallel to said blade,

a relatively fiat bottom plate hingedly suspended the'lower portions thereof, a rear wall rigidly inof said wall, and a relatively fiat bottom plate hingedly suspended near said blade and having its rear end swingable along and in close proximity to the curved surface of said wall.

8. A scraper comprising, a transportable frame having a scraper blade, a wall suspended fromsaid frame rear-wardly of said blade and having a curved front surface generated about the blade as an approximate center, and a bottom plate hingedly suspended near said blade and havin near said blade and having its swinging end movable along and in close proximity to said wall, a track carried by said frame centrally above said plate, an elementrollable along said track, a link pivotally connected to said element and to the swinging end of said bottom plate, and

means for advancing said element along said track. g

14. A scraper comprising, a transportable frame having rigid side walls and a blade connecting terconnecting said side walls remote from said blade and having a curved frontload confining surface, a relatively flat bottom plate pivotally suspended from said frame near said blade and having its rear end swingable in close proximity to and along said surface, atrack carried'by said frame between said side walls and above said bottom plate, a sheave movable along said track and being articulably connected .to the rear of said plate, and a cable for advancing said I sheave along said track to swing said bottom plate.

15. A scraper comprising, a transportable frame having rigid side walls and a blade connectin the lower portions thereof, a rear wall rigidly its rear end swingable along and in close proximity to said surface.

9. A scraper comprising, a transportableframe having rigid side walls and a blade connecting the lower portions thereof, a rear wall rigidly connecting said side walls rearwardly of said blade and having a curved front surface generated about the blade as an approximate center,

and a bottom plate hingedly suspended from said frame near said blade and having its rear end swingable along and in close proximity to said curved surface.

10. A scraper comprising, a transportable frame having a scraper blade, a wall suspended from said frame rearwardly of said blade and having a curved front surface generated about the blade as an approximate center, a bottom plate hingedly suspended near said blade and having its rear end proximityto said surface, and mechanism disposed centrally above said plate and comprising parts movable longitudinally of said frame for swinging said bottom plate to dump material over said blade. k 11. A scraper comprising, frame having a transverse scraper blade, a trans verse wall suspended fromsaid frame parallel to said blade and having a curved load confining surface facing the blade and generated thereabout as an approximate center, and a relatively flat'load supporting plate pivotally suspended near said blade and having its' swinging end a transportable swingable along and in close interconnecting said side walls remote from said blade and having a curved front load confining surface, a relatively flat bottom plate pivotally suspended from said frame near said blade and havingits rear end swingable in close proximity to and along said surface, a track carried by said frame between said side walls and above said bottom plate, a sheave movable along said track, a link pivotally attached to said sheave and to the rear end of said bottom plate, and a cable for advancing said sheave along said track to tilt said bottom plate.

16. A scraper comprising, a transportable frame having a transverse scraper blade and an upwardly extending forwardly inclined fixed rear wall, a relatively fiat bottom plate hingedly suspended near said blade and having its rear end swingable along and in close proximity to said fixed wall, a forwardly extending upwardly incllned track carried by said frame centrally above saidbottom plate, a sheave movable along said track, means articulably connecting said sheave with the rear end of said bottom plate, and a cable for advancing said sheave along said track to tilt said bottom plate- 17. A scraper comprising, a transportable frame having a transversescraper blade and an upwardv1y extending forwardlyinclined fixed rear wall,

a relatively flat bottom plate hingedly suspended near said blade and having its rear end swingmovable along and in close proximity 'to said surface 12. A scraper comprising,'a transportable frame loadecnnning blade and a fixed wall disposed parallel to said blade,

able along and in close proximity to said fixed wall, a forwardly extending upwardly inclined track carried by said frame centrally above said bottom plate, a sheave movable along said track, a forwardly extending upwardly inclined link pivotally attached to said sheave and to .the rear swinging end of said bottom plate, and a cable for advancing said sheave along said track to tilt said bottom plate through said link. 18. A scraper comprising, a transportable fram having a transverse scraper blade and a fixed loadconflningwall disposed parallel to said blade, a relatively flat bottom plate hingedly suspended near said, blade and having its swinging end movable upwardly along said wall, and a scraper ing a cutting blade rigidly attached thereto, a

- load carrying element forming a bottom pivotalflap carried by said swinging plate end and engaging the adjacent surface of said will.

19. A scraper comprising, a transportable frame having a transverse scraper blade and a fixed wall disposed parallel to said blade and provided with a curved load confining surface generated about the blade as an approximate center, a rela tively'flat bottom plate pivotallysuspended near said blade and having its swinging end movable along said surface, and a scraper flap interposed between said plate and said surface.

20. A scraper comprising, a transportable frame having a transverse scraper blade and a fixed wall disposed parallel to said blade and provided with a curved load confining surface generated about the blade as an approximate center, a.

relatively flat bottom plate pivotally suspended 'near said blade and having its swinging end movable along said surface, and a scraper flap pivotallysuspendcd from the swinging end of said plate and coacting with saidcurved surface. on 21. In combination, a transportable frame, a

load carrying element frame centrally above said bottom forming elemom, a sheavemovable along said track, a link tiltable relative to said frame, a track carried by said frame directly over connecting said sheave with said bottom forming element remote from the pivotal axis of the latter, and means for advancing said sheave along said traclr to tilt said bottom forming element about said axis.

23. In combination, a transportable frame having a cutting blade rigidly attached thereto, a

load carrying element forming a bottom swing-'-.

able' relative to said frame about an axis disposed near said blade, an inclined track carried track, a .link connecting said sheave with said element remote from the pivotal axis of the latter, a second sheave fixedly 'ioumalled to said track, and a cablecoacting with said sheaves to advance said movable sheave along said track and thereby tilt said element about said axis;

26. In combination, a transportable frame having a cutting blade rigidly attached thereto, a load carrying element forming a bottom swingable relative to said frame .about' an axis disposed near said blade, an inclined track carried by said frame directly over. said element and intermediate the width of said element and extending upwardly and forwardly from the rear of said element, a sheave movable along said track and being connected to the rear portion of said element remote from said axis, a sheave rotattrack to move said element relative to said frame. Y

28. In combination, a transportable frame, a load carrying element forming a bottom tiltable upon said frame, a track supported by said frame centrally above said element, sheaves movable along saidtrack and being connected to said element remote from its axis ofswing, rollers supporting said movable sheaves upon said track, and a cable for advancing said sheaves along said track to tilt said element relative to said frame.

' '29. In combination, a transportable frame having opposite side wallsrigidly interconnected by a transverse front beam member and by a trans-' verse rear forwardly and upwardly inclined plate member, a scraper'blade interposed between said sidewalls rearwardly of said beam and forwardly of said'plate member, and 'adoad carrying ele-' 'ment forming a movable bottom pivotally sup- 7 v by said-frame directly over said element and intermediate the width thereof and extending upwardly and forwardly from the rear ;of said.

element, a sheave movable along said track and being connected to the rearv portion of said ele- 'ment remote from said axis, and means for moving said sheave upwardlyalong said track to tilt said elementabout said axis. --24I "In combination, a transportable frame, a

I I load carrying element forming a bottom tiltable relative to said frame, a track carriedby said frame centrally above said element, a sheave movable along said track and being secured to said element remote from the axis of tilting o the latter,

of said track, and a cable coactingwit h said. v sheaves to advance said movable sheave along said track and thereby tilt said element.

25. In combination, a transportable frame havanother sheave ioumalled at an 811$ edge swingable along and in close proximity to said plate member to remove material 'from contact with said plate member. v

30. In combination, a transportable frame hav-, ing opposite side walls rigidly interconnected by a transverse front beam member and by a transverse rear forwardly and upwardly inclined plate member, a scraper blade interposed betweensaid I side walls 'rearwardly of said 'beam' and forwardly of-said plate 'membena load carrying element forming a movable bottom pivotally supported near said blade and having a rear upper edge. swingable along and in close proximity to said' plate member to remove material fromcontact with said plate member, and means operable from v the front of said framefor swinging said element to dump material over said blade.

31. In combination, a transportable frame having opposite side walls rigidly interconnected by a transverse front beam member and by a trans- V verse rear forwardly and upwardly inclined plate member, a scraper blade interposed saideases side walls rearwardly of said beam and forwardly of said plate member, a load carrying element forming a movable bottom pivotally supported near said blade and having a rear portion swingable along and in close proximity to said plate member, a track carried by said frame beam and plate member centrally above said element,- a

sheave movable along said track and being connected to said rear swinging portion of said element, and cable means for advancing said sheave along said track.

. 32. In combination, a transportable frame having opposite side walls rigidly interconnected by a transverse front beam member and by a trans verse rear forwardly and upwardly inclined plate member, a scraper blade interposed between said side walls rearwardly of said beam and forwardb of said plate member, a load carrying element forming a movable bottom pivotally supported near said blade and having a rear portion swingable along and inclose proximity to said plate member, an upwardly and forwardly inclined track carried by said frame beam and plate member centrally above said element, a sheave movable along said track, a link pivotally connected to said sheave and to said swinging rear portion of said element, and cable means for advancing said sheave along said track.

33. In combination, a wheel supported transportable frame having laterally spaced opposite side walls rigidly interconnected at the rear by a transverse forwardly and upwardly inclined plate member, a transversescraper blade spanning the space between the lower portions of said walls forwardly of said plate member, a load carrying element forming a movable bottom pivotally suspended near saidblade and having a rear scraper edge swingable along and in close proximity to said plate member to remove material from contact with said plate member, and cable means operable from the front of said frame for swinging said element to dump material over said blade.

34. In combination, a wheel supported transportable frame having laterally spaced opposite side walls rigidly interconnected at the rear by a transverse forwardly and upwardly inclined plate member, a transverse scraper blade spanning the space between the lower portions of said walls forwardly of said plate member, a load carrying element forming a movable bottom pivotally susmember, a sheave movable along said track and being connected to said rear of said element, and

cable means for advancing said sheave along said track. i

35. In combination, a wheel supported transportable frame having laterally spacedopposite side walls rigidly interconnected at the rear by a transverse forwardly and upwardly inclined plate member, a transverse scraper blade spanning the space between the lower portions of said walls forwardly of said plate member, a load carrying element forming a movable bottom pivotally suspendednear said blade and having a rear portion swingable along and in close proximity to said plate member, a track carried by said frame medially above said element and extending upwardly and forwardly from the top of said plate member, a sheave movable along said track, a link pivotally connected to said sheave and to said rear of the element, and cable means for advancing said sheave along said track.

36. In combination, a wheel supported transpended near said blade and having a rear portion swingable along and in close proximity to said plate' member, a track carried by said frame medially above said bottom and extending upwardly and forwardly from the top of said plate member, a sheave movable along said track, a link pivotallyconnected to said sheave andto said rear of the element, another sheave journalled at the upper forward end of said track, and a cable coacting with said sheaves and being operable to advance said movable sheave and to thereby tilt said element.

HENRY C. FRENCH. 

